IMPLICATIONS OF BARYON ASYMMETRY FOR THE ELECTRIC-DIPOLE MOMENT OF THE NEUTRON

The supersymmetric standard model (SSM) contains a new source of CP vi olation in the mass-squared matrices for squarks, which could imply th e t squark mediation of the charge transport mechanism producing the b aryon asymmetry of the universe. This CP-violating source also induces the electric dipole moment (EDM) of the neutron. We show that this t- squark transport can lead to a baryon asymmetry consistent with its ob served value within reasonable ranges of SSM parameters, where the neu tron EDM has a magnitude slightly smaller than its experimental upper bound.